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WAXS

How cyclic chain topology can reduce the crystallization rate of poly(3-hexylthiophene) and promote the formation of liquid crystalline phases in comparison with linear analogue chains

Maiz, Jon; Liu, Guoming; Ruipérez, Fernando; Delbosc, Nicolas; Coulembier, Olivier; Wang, Dujin; Müller, Alejandro J.

 (Natural) polymersApplicationCharacterizationCustomer publicationsMaterialPhase analysisPolymer researchSelf-assembled materialTechniqueWAXS

How cyclic chain topology can reduce the crystallization rate of poly(3-hexylthiophene) and promote the formation of liquid crystalline phases in comparison with linear analogue chains

Maiz, Jon; Liu, Guoming; Ruipérez, Fernando; Delbosc, Nicolas; Coulembier, Olivier; Wang, Dujin; Müller, Alejandro J.

We have studied how cyclic topology affects the crystallization and morphology of π-conjugated poly(3-hexylthiophene) (P3HT) molecules by comparing linear and cyclic analogues for the first time, with three different chain lengths. We employ a range of experimental techniques including wide-angle X-ray scattering (WAXS), polarized light optical microscopy (PLOM), differential scanning…
Room-Temperature Ferromagnetic Sr3YCo4O10+δ and Carbon Black-Reinforced Polyvinylidenefluoride Composites toward High-Performance Electromagnetic Interference Shielding

Lalan, Vidhya; Puthiyedath Narayanan, Aparna; Surendran, Kuzhichalil Peethambharan; Ganesanpotti, Subodh

 ApplicationCharacterizationCompositesCustomer publicationsMaterialPhase analysisPolymer researchTechniqueWAXS

Room-Temperature Ferromagnetic Sr3YCo4O10+δ and Carbon Black-Reinforced Polyvinylidenefluoride Composites toward High-Performance Electromagnetic Interference Shielding

Lalan, Vidhya; Puthiyedath Narayanan, Aparna; Surendran, Kuzhichalil Peethambharan; Ganesanpotti, Subodh

In this study, we fabricated composites of conducting carbon black (CB), room-temperature ferromagnetic Sr3YCo4O10+δ (SYCO) and polyvinylidenefluoride (PVDF) by the solution mixing and coagulation method for the first time. During the nucleation process of PVDF, the presence of SYCO and CB individually facilitates the crystallization of polar β and semipolar…
5 nm Ordered Structures Self-Assembled by C2-Symmetric Hybrids with Polyhedral Oligomeric Silsesquioxane and Hexa-peri-Hexabenzocoronene.

Zhang, Wei; Pan, Hongbing; Lyu, Xiaolin; Gu, Kehua; Xiao, Anqi; Shen, Zhihao; Fan, Xing-he

 ApplicationCharacterizationCustomer publicationsGIWAXSInorganic materialsPhase analysisSurface structure and patternsTechniqueWAXS

5 nm Ordered Structures Self-Assembled by C2-Symmetric Hybrids with Polyhedral Oligomeric Silsesquioxane and Hexa-peri-Hexabenzocoronene.

Zhang, Wei; Pan, Hongbing; Lyu, Xiaolin; Gu, Kehua; Xiao, Anqi; Shen, Zhihao; Fan, Xing-he

Hybrids consisting of polyhedral oligomeric silsesquioxane (POSS) and hexa-peri-hexabenzocoronene (HBC) with a dumbbell topology and C2 symmetry were designed and synthesized. They self-assemble into 5 nm ordered structures. In particular, the increased steric effect with increasing POSS units stabilizes a square columnar phase (Colsqu) which is important in nanotemplating. These…
De-symmetrizing periodically grafted amphiphilic copolymers: design, synthesis and generation of Janus folded chains

Sarkar, Ramkrishna; Gowd, E. Bhoje; Ramakrishnan, S.

 (Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPhase analysisPolymer researchSAXSTechniqueTemperatureWAXS

De-symmetrizing periodically grafted amphiphilic copolymers: design, synthesis and generation of Janus folded chains

Sarkar, Ramkrishna; Gowd, E. Bhoje; Ramakrishnan, S.

Periodically grafted amphiphilic copolymers (PGACs) were earlier shown to fold in a zigzag fashion to enable segregation of the two immiscible segments, namely the backbone and the pendant segments; crystallization of one or both segments led to the formation of a lamellar structure with the two segments located in alternate…
Sustainable in Situ Approach to Covalently Functionalize Graphene Oxide with POSS Molecules Possessing Extremely Low Dielectric Behavior

Joseph, Angel Mary; Nagendra, Baku; Surendran, K. P.; Gowd, E. Bhoje

 (Natural) polymersApplicationCharacterizationCompositesCustomer publicationsMaterialPhase analysisPolymer researchTechniqueWAXS

Sustainable in Situ Approach to Covalently Functionalize Graphene Oxide with POSS Molecules Possessing Extremely Low Dielectric Behavior

Joseph, Angel Mary; Nagendra, Baku; Surendran, K. P.; Gowd, E. Bhoje

Incorporation of multifunctional inorganic additives into the commercial polymers still stands as the most captivating and effective way to realize new-generation electronic components. Here, we introduce a simple, cost-effective, and environmentally benign method to covalently functionalize graphene oxide (GO) with vinyl- and aminopropyl-functionalized hybrid silica spheres with a polyhedral…
Directed Assembly of Hierarchical Supramolecular Block Copolymers: A Strategy To Create Donor–Acceptor Charge-Transfer Stacks

Deepthi, Krishnan; Amal, Raj R. B.; Rajeev, V. R.; Unni, K. N. Narayanan; Gowd, E. Bhoje

 (Natural) polymersApplicationCharacterizationCustomer publicationsMaterialPhase analysisPolymer researchSAXSTechniqueTemperatureWAXS

Directed Assembly of Hierarchical Supramolecular Block Copolymers: A Strategy To Create Donor–Acceptor Charge-Transfer Stacks

Deepthi, Krishnan; Amal, Raj R. B.; Rajeev, V. R.; Unni, K. N. Narayanan; Gowd, E. Bhoje

Macromolecules, 2019, vol 52, 7, pp. 2889-2899DOI:10.1021/acs.macromol.8b02448Visit the full articleBack to the overview
Electrospun PCL-protein scaffolds coated by pyrrole plasma polymerization

Cruz, Yeyzon; Muñoz, Efrén; Gomez-Pachón, E. Y.; Morales-Corona, Juan; Olayo-Lortia, Jesús; Olayo, Roberto; Olayo-Valles, Roberto

 (Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsFibersMaterialPhase analysisPolymer researchSAXSTechniqueWAXS

Electrospun PCL-protein scaffolds coated by pyrrole plasma polymerization

Cruz, Yeyzon; Muñoz, Efrén; Gomez-Pachón, E. Y.; Morales-Corona, Juan; Olayo-Lortia, Jesús; Olayo, Roberto; Olayo-Valles, Roberto

Polymeric scaffolds prepared from polycaprolactone (PCL), PCL-collagen and PCL-elastin were prepared by electrospinning. The scaffolds were coated by plasma polymerization of pyrrole doped with iodine, to improve cellular adhesion and fibroblast proliferation. The morphology, composition, and crystalline structure of the scaffolds were characterized by scanning electron microscopy (SEM),…
Multiscale Self-Assembly of a Phenyl-Flanked Diketopyrrolopyrrole Derivative: A Solution-Processable Building Block for π-Conjugated Supramolecular Polymers

Wang, Kai; Bohra, Hassan; Gonçalves, Rui A.; Bhatnagar, Harshangda; Wu, Yingjie; Wang, Xiaochen; Wang, Zheng; Wei, Xin; Lam, Yeng Ming; Wang, Mingfeng

 (Natural) polymersApplicationCharacterizationCustomer publicationsLiquid crystalsMaterialPhase analysisPolymer researchSAXSSelf-assembled materialTechniqueTemperatureWAXS

Multiscale Self-Assembly of a Phenyl-Flanked Diketopyrrolopyrrole Derivative: A Solution-Processable Building Block for π-Conjugated Supramolecular Polymers

Wang, Kai; Bohra, Hassan; Gonçalves, Rui A.; Bhatnagar, Harshangda; Wu, Yingjie; Wang, Xiaochen; Wang, Zheng; Wei, Xin; Lam, Yeng Ming; Wang, Mingfeng

We report a solution-processable π-conjugated molecular building block (denoted as PhDPP) consisting of a rigid and planar core of phenyl-flanked diketopyrrolopyrrole and “soft” branched alkoxy chains that endow the solubility in a variety of organic solvents. Intermolecular hydrogen bonding in PhDPP was revealed in nonpolar solvents above a threshold of…
A high-performance BaTiO 3 -grafted-GO-laden poly(ethylene oxide)-based membrane as an electrolyte for all-solid lithium-batteries

Angulakshmi, N.; Prasanna Kar, Goutam; Bose, Suryasarathi; Bhoje Gowd, E.; Thomas, Sabu; Manuel Stephan, A.

 (Natural) polymersApplicationCharacteristic dimensionCharacterizationCompositesCrystalline fractionCustomer publicationsMaterialRenewable energySAXSTechniqueWAXS

A high-performance BaTiO 3 -grafted-GO-laden poly(ethylene oxide)-based membrane as an electrolyte for all-solid lithium-batteries

Angulakshmi, N.; Prasanna Kar, Goutam; Bose, Suryasarathi; Bhoje Gowd, E.; Thomas, Sabu; Manuel Stephan, A.

Nanocomposite polymer electrolytes (NCPEs) comprising poly(ethylene oxide) (PEO), barium titanate-grafted-graphene oxide (BaTiO3-g-GO) and lithium bis(trifluoromethanesulfonyl imide) (LiTFSI) were prepared by a simple hot-press technique. An increase of two orders of magnitude in the ionic conductivity was achieved upon incorporation of BaTiO3-g-GO in the polymeric matrix even at 0 °C. The…
Tuning the properties of electrospun polylactide mats by ethanol treatment

Pavlova, Elizaveta R.; Bagrov, Dmitry V.; Monakhova, Kristina Z.; Piryazev, Alexey A.; Sokolova, Anastasia I.; Ivanov, Dimitri A.; Klinov, Dmitry V.

 (Natural) polymersApplicationCharacterizationCustomer publicationsFibersMaterialOrientation analysisPolymer researchTechniqueWAXS

Tuning the properties of electrospun polylactide mats by ethanol treatment

Pavlova, Elizaveta R.; Bagrov, Dmitry V.; Monakhova, Kristina Z.; Piryazev, Alexey A.; Sokolova, Anastasia I.; Ivanov, Dimitri A.; Klinov, Dmitry V.

In the present work, we analyzed the changes in structure and mechanical properties of electrospun PLA mats induced by ethanol treatment. The amorphous PLA mats gained elasticity when immersed into ethanol (the elongation at break increased from ?~50% in air to ?~280% in ethanol) and partly retained it after drying…
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